refraction and snell's law

When light undergoes refraction which of the following property of light remains constant?

• Wave length

• Wave speed

• frequency

• Angle of

  incidence

When light travels from medium 1 to medium 2, light is found to be refracted away from the normal. Which of the following statements is true regarding the refractive indices and the wavelength of light for the two mediums?

• n1 > n2,, λ1>λ2

• n1 > n2, λ1<λ2

• n1 < n2, λ1>λ2

• n1 <n2, λ1<λ2

Absolute refractive index of any medium other then air and vaccume is always

• Equal to 0

• Greater then 1

• Less then 1

• Equal to 1

which of the following represent angle of incidence and refraction respectively?

• A and C

• A and B

• B and D

• d and C

what is the velocity of light in a medium of refractive index 2

• 2 x 10⁸ m/s

• 1.5 x 10⁸ m/s

• 3 x 10⁸ m/s

• 0.66 x 10⁸ m/s

snell's law equation for the figure shown is

• n_{w sin 34.5}⁰ =n_{g sin 60}⁰

• n_{g sin 34.5}⁰ =n_{w sin 60}⁰

• n_{g sin 60}⁰ =n_{w sin 34.5}⁰

• n_{g sin 34.5}⁰ =n_{w sin 34.5}⁰

when light ray travels from less denser medium to more denser medium

• it bends away from normal

• it bends towards normal

• it continues to move in same direction

• it reflects

refractive index of material x is

• n= $\frac{\sin\ 48.6}{\sin\ 30}$

• n= $\frac{\sin\ 30}{\sin\ 48.6}$

• $n=\frac{\sin\ 48.6}{\sin\ 48.6}$

• not possible to predict